EP3861223A1 - Drive portion of a tripod joint with inner central anti-tilting protrusions - Google Patents

Drive portion of a tripod joint with inner central anti-tilting protrusions

Info

Publication number
EP3861223A1
EP3861223A1 EP19787039.7A EP19787039A EP3861223A1 EP 3861223 A1 EP3861223 A1 EP 3861223A1 EP 19787039 A EP19787039 A EP 19787039A EP 3861223 A1 EP3861223 A1 EP 3861223A1
Authority
EP
European Patent Office
Prior art keywords
axial direction
drive part
tripod joint
internal face
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19787039.7A
Other languages
German (de)
French (fr)
Other versions
EP3861223B1 (en
Inventor
Francois PUCHALA
Alain FAUDAIS
Sebastien JAMAIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
Original Assignee
PSA Automobiles SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3861223A1 publication Critical patent/EP3861223A1/en
Application granted granted Critical
Publication of EP3861223B1 publication Critical patent/EP3861223B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
    • F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
    • F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints

Definitions

  • the invention relates to tripod seals, and more specifically the drive parts (or driving bowls) which are part of such tripod seals.
  • Tripod seals are mechanical equipment which is responsible for ensuring the transmission of a rotational movement between two concurrent axes. They are frequently, but not limited to, used in vehicle transmissions, generally of the automobile type, because at all times they allow the rotational speeds of the two concurrent axes which they couple to be equal. In addition, they allow significant angular deviations between these concurrent axes (typically up to 25 °), which is advantageous in certain situations, such as when the shaft of a car wheel has to follow the deflections of the associated suspension. Thus, they are very often used in transverse transmissions by being fixedly secured to the output shaft of the gearbox and to the shaft of a wheel (which then constitute the two concurrent axes).
  • a tripod joint comprises a drive part (or entraining bowl or tulip) to which is coupled an internal element placed at the end of one of the two concurrent axes (and more precisely that which is called hereinafter “axis tripod ").
  • This internal element is provided with three journals distributed at 120 ° from each other in the same plane, perpendicular to the axial direction of the tripod axis which it equips, and each comprising an end equipped with a roller.
  • the drive part (or entraining bowl or tulip) comprises an internal face which delimits an open housing comprising on the periphery three reception zones distributed at 120 ° from one another and each intended for loçpr in following translation the axial direction one of the rollers.
  • These three reception areas define three rectilinear ramps spaced 120 ° apart for the three rollers which ensure the junction and transmission of mechanical power between the tripod axis and the drive part (or tulip). Furthermore, the three rollers can be guided on the three pins in sliding pivot connections by three needle bearings, or in an annular connection (as described in patent document FR 2800817).
  • the assembly is also generally lubricated by grease which is retained in the tripod joint by a bellows.
  • a drawback of this mounting of the rollers in the reception areas lies in the fact that in the event of rotation of the drive part (or tulip) at least one of the rollers can tilt in its reception area, this which can slow down or even prevent the translation of the internal element of the tripod seal.
  • the invention therefore aims in particular to improve the situation.
  • a drive part on the one hand, intended to form part of a tripod joint comprising an internal element comprising three pins distributed at 120 ° from one another in the same plane, perpendicular to a direction axial, and each comprising an end equipped with a roller, and, on the other hand, comprising an internal face delimiting an open housing comprising on the periphery of three reception zones distributed at 120 ° from one another and each intended for loçpr in translation in the axial direction one of the rollers.
  • each part of the internal face delimiting a reception area comprises a central sub-part defining a protuberance which extends in the axial direction and on which is intended to rest the associated roller so that it remains in the reception area during a rotation of the drive part.
  • the rollers no longer risk tilting during the rotations of the drive part, and at the same time the friction of the rollers during their translations is reduced since they do not each have more than a single central support on an associated central protuberance.
  • the drive part according to the invention may include other characteristics which can be taken separately or in combination, and in particular:
  • each protuberance can have a radiated shape
  • the radiated shape can, for example, have a radius of between 1 mm and 100 mm;
  • Each central sub-part can be an integral part of a wall which has the internal face;
  • each central sub-part may be an element which is attached to a wall comprising the internal face;
  • each central sub-part can be an element added by screwing on the internal face of the wall.
  • the invention also provides a tripod joint comprising, on the one hand, an internal element provided with three journals distributed at 120 ° from each other in the same plane, perpendicular to an axial direction, and each comprising an end equipped with a roller, and, on the other hand, a drive part of the type presented above and housing this internal element.
  • the invention also provides a gearbox intended to be part of a transverse transmission and comprising a tripod joint of the type presented above.
  • the invention also provides a vehicle, possibly of the automobile type, and comprising at least one tripod joint of the type presented above or a gearbox of the type presented above.
  • FIG. 1 schematically illustrates, in a sectional view in a longitudinal plane, an embodiment of a drive piece according to the invention, equipped with a single roller, and
  • Figure 2 schematically illustrates the drive part of Figure 1 in a sectional view along the axis ll-ll.
  • the purpose of the invention is in particular to provide a PE drive part intended to be part of a JT tripod joint.
  • the tripod joint JT is intended to equip a gearbox, and more precisely to be fixedly secured to the output shaft of a gearbox. But the invention is not limited to this application.
  • the gearbox is intended to be part of a transverse transmission of a wheeled vehicle (possibly of automobile type).
  • the tripod seal couples the output shaft of the gearbox to the shaft of a vehicle wheel.
  • the invention is not limited to this type of gearbox or to this type of vehicle.
  • FIG. 1 There is schematically shown in Figures 1 and 2 an embodiment of a PE drive part according to the invention, before it equips a tripod joint JT, and therefore before its coupling to an internal element of this last (JT).
  • the internal element comprises three trunnions which are distributed at 120 ° from each other in the same plane, perpendicular to the axial direction da of a concurrent axis which it equips (hereinafter called "tripod axis" ), and which each have one end fitted with a roller G.
  • the position of one of the three rollers G in the drive part PE is illustrated in FIGS. 1 and 2.
  • the drive part (or entraining bowl or even tulip) PE comprises a wall PP which has an internal face F1 defining an open housing LO.
  • This open housing LO comprises on its periphery (located near the internal face Fl of the wall PP) three reception zones ZA which are distributed at 120 ° from one another and each intended to be housed in translation in the axial direction da one of the three rollers G.
  • These three reception zones ZA define three rectilinear ramps for the respective translations of the three rollers G which ensure the junction and the transmission of the mechanical power between their tripod axis and the drive part PE.
  • each roller G is for example guided in annular connections on their three respective journals by three needle bearings.
  • each roller G comprises a housing LT intended to receive a terminal part of a journal with its needle bearing.
  • each part of the internal face F1 delimiting a reception zone ZA comprises a central sub-part which defines a protuberance PC extending in the axial direction da.
  • Each protuberance PC is intended to allow the associated roller G to press on it so that it (G) remains in the reception zone ZA during a rotation of the drive element PE.
  • each central protuberance PC may, for example, have a semi-spherical shape.
  • each central protuberance PC can have a radiated shape.
  • the radiated shape can, for example and without limitation, have a radius between 1 mm and 100 mm.
  • the radius can, for example, be equal to about 30 mm.
  • each roller G has a central support to prevent it from pivoting and to keep it in the axis of the rectilinear ramp of its reception area ZA. Consequently, each central protuberance PC could be in the form of a central "line” (along the axial direction da) of very small thickness (along the direction of the axis of the associated journal).
  • each central sub-part (defining a central protuberance PC) can be an integral part of the wall PP which comprises the internal face Fl.
  • each central sub-part (defining a central protuberance PC) can be an element attached to the wall PP which has the internal face F1.
  • each central sub-part can, for example , be an element which is attached by screwing on the internal face F1 of the wall PP.
  • a fastening by screwing one could provide for a fastening by welding or gluing.

Abstract

A drive portion (PE) forms part of a tripod joint (JT) comprising an inner element provided with three journals distributed at 120° from one another in the same plane, perpendicular to an axial direction, and each having one end provided with a roller (G). Said drive portion (PE) comprises an inner face (FI) defining an open housing (LO) provided at the periphery of three receiving areas (ZA) which are distributed at 120° from one another and each intended to accommodate one of the rollers (G) in translation in the axial direction. Each portion of the inner face (FI) defining a receiving area (ZA) comprises a central sub-portion defining a protrusion (PC) which extends in the axial direction and on which the associated roller (G) rests so that the latter (G) remains in the receiving area (ZA) upon rotation of the drive portion (PE).

Description

PIÈCE D’ENTRAÎNEMENT DE JOINT TRIPODE À  TRIPOD JOINT DRIVE WITH
PROTUBÉRANCES CENTRALES INTERNES ANTIBASCULEMENT  ANTI-TIPPING CENTRAL INTERNAL PROTUBERANCES
Domaine technique de l’invention Technical field of the invention
L’invention concerne les joints tripodes, et plus précisément les pièces d’entraînement (ou bols entraîneurs) qui font partie de tels joints tripodes.  The invention relates to tripod seals, and more specifically the drive parts (or driving bowls) which are part of such tripod seals.
Etat de la technique State of the art
Les joints tripodes (parfois appelés accouplements tripodes) sont des équipements mécaniques qui sont chargés d’assurer la transmission d’un mouvement de rotation entre deux axes concourants. Ils sont fréquemment, mais non limitativement, utilisés dans les transmissions des véhicules, généralement de type automobile, du fait qu’à chaque instant ils permettent que les vitesses de rotation des deux axes concourants qu’ils couplent soient égales. En outre, ils autorisent des écarts angulaires importants entre ces axes concourants (typiquement jusqu’à 25°), ce qui s’avèO avantageux dans certaines situations, comme par exemple lorsque l’arbre d’une roue d’une voiture doit suivre les débattements de la suspension associée. Ainsi, ils sont très souvent utilisés dans les transmissions transversales en étant solidarisés fixement à l’arbre de sortie de la boîte de vitesses et à l’arbre d’une roue (lesquels constituent alors les deux axes concourants).  Tripod seals (sometimes called tripod couplings) are mechanical equipment which is responsible for ensuring the transmission of a rotational movement between two concurrent axes. They are frequently, but not limited to, used in vehicle transmissions, generally of the automobile type, because at all times they allow the rotational speeds of the two concurrent axes which they couple to be equal. In addition, they allow significant angular deviations between these concurrent axes (typically up to 25 °), which is advantageous in certain situations, such as when the shaft of a car wheel has to follow the deflections of the associated suspension. Thus, they are very often used in transverse transmissions by being fixedly secured to the output shaft of the gearbox and to the shaft of a wheel (which then constitute the two concurrent axes).
Un joint tripode comprend une pièce d’entraînement (ou bol entraîneur ou encore tulipe) à laquelle est couplé un élément interne placé à l’extrémité de l’un des deux axes concourants (et plus précisément celui qui est appelé ci-après « axe tripode »). Cet élément interne est muni de trois tourillons répartis à 120° les uns des autres dans un même plan, perpendiculaire à la direction axiale de l’axe tripode qu’il équipe, et comportant chacun une extrémité équipée d’un galet. La pièce d’entraînement (ou bol entraîneur ou encore tulipe) comprend une face interne qui délimite un logement ouvert comportant en périphérie trois zones d’accueil réparties à 120° les unes des autres et destinées chacune à loçpr en translation suivant la direction axiale l’un des galets. Ces trois zones d’accueil définissent trois rampes rectilignes espacées de 120° pour les trois galets qui assurent la jonction et la transmission de la puissance mécanique entre l’axe tripode et la pièce d’entraînement (ou tulipe). Par ailleurs, les trois galets peuvent être guidés sur les trois tourillons en liaisons pivots glissants par trois roulements à aiguilles, ou en liaison annulaire (comme décrit dans le document brevet FR 2800817). L’ensemble est en outre généralement lubrifié par de la graisse qui est retenue dans le joint tripode par un soufflet. A tripod joint comprises a drive part (or entraining bowl or tulip) to which is coupled an internal element placed at the end of one of the two concurrent axes (and more precisely that which is called hereinafter “axis tripod "). This internal element is provided with three journals distributed at 120 ° from each other in the same plane, perpendicular to the axial direction of the tripod axis which it equips, and each comprising an end equipped with a roller. The drive part (or entraining bowl or tulip) comprises an internal face which delimits an open housing comprising on the periphery three reception zones distributed at 120 ° from one another and each intended for loçpr in following translation the axial direction one of the rollers. These three reception areas define three rectilinear ramps spaced 120 ° apart for the three rollers which ensure the junction and transmission of mechanical power between the tripod axis and the drive part (or tulip). Furthermore, the three rollers can be guided on the three pins in sliding pivot connections by three needle bearings, or in an annular connection (as described in patent document FR 2800817). The assembly is also generally lubricated by grease which is retained in the tripod joint by a bellows.
Un inconvénient de ce montage des galets dans les zones d’accueil réside dans le fait qu’en cas de rotation de la pièce d’entraînement (ou tulipe) l’un au moins des galets peut basculer dans sa zone d’accueil, ce qui peut freiner, voire empêcher, la translation de l’élément interne du joint tripode.  A drawback of this mounting of the rollers in the reception areas lies in the fact that in the event of rotation of the drive part (or tulip) at least one of the rollers can tilt in its reception area, this which can slow down or even prevent the translation of the internal element of the tripod seal.
Il a certes été proposé dans le document brevet US 6,958,016, de réduire la profondeur de chaque zone d’accueil dans deux sous-parties latérales opposées d’une même face afin que le galet s’appuie sur ces deux sous-parties et ainsi ne bascule pas. Cependant, un tel agencement induit d’importants frottements qui ralentissent les translations de l’élément interne du joint tripode et donc augmentent le temps de réaction de ce dernier.  It has certainly been proposed in the patent document US Pat. No. 6,958,016 to reduce the depth of each reception area in two opposite lateral subparts of the same face so that the roller rests on these two subparts and thus does not not switch. However, such an arrangement induces significant friction which slows the translations of the internal element of the tripod seal and therefore increases the reaction time of the latter.
L’invention a donc notamment pour but d’améliorer la situation.  The invention therefore aims in particular to improve the situation.
Présentation de l’invention Presentation of the invention
Elle propose notamment à cet effet une pièce d’entraînement, d’une part, destinée à faire partie d’un joint tripode comportant un élément interne comprenant trois tourillons répartis à 120° les uns des autres dans un même plan, perpendiculaire à une direction axiale, et comportant chacun une extrémité équipée d’un galet, et, d’autre part, comprenant une face interne délimitant un logement ouvert comportant en périphérie de trois zones d’accueil réparties à 120° les unes des autres et destinées chacune à loçpr en translation suivant la direction axiale l’un des galets.  To this end, it proposes in particular a drive part, on the one hand, intended to form part of a tripod joint comprising an internal element comprising three pins distributed at 120 ° from one another in the same plane, perpendicular to a direction axial, and each comprising an end equipped with a roller, and, on the other hand, comprising an internal face delimiting an open housing comprising on the periphery of three reception zones distributed at 120 ° from one another and each intended for loçpr in translation in the axial direction one of the rollers.
Cette pièce d’entraînement se caractérise par le fait que chaque partie de la face interne délimitant une zone d’accueil comprend une sous-partie centrale définissant une protubérance qui s’étend suivant la direction axiale et sur laquelle est destiné à s’appuyer le galet associé afin que ce dernier reste dans la zone d’accueil lors d’une rotation de la pièce d’entraînement. This drive piece is characterized by the fact that each part of the internal face delimiting a reception area comprises a central sub-part defining a protuberance which extends in the axial direction and on which is intended to rest the associated roller so that it remains in the reception area during a rotation of the drive part.
Grâce à leurs trois appuis centraux sur les trois protubérances centrales associées, les galets ne risquent plus de basculer lors des rotations de la pièce d’entraînement, et dans le même temps les frottements des galets lors de leurs translations sont réduits puisqu’ils n’ont plus chacun qu’un seul appui central sur une protubérance centrale associée.  Thanks to their three central supports on the three associated central protrusions, the rollers no longer risk tilting during the rotations of the drive part, and at the same time the friction of the rollers during their translations is reduced since they do not each have more than a single central support on an associated central protuberance.
La pièce d’entraînement selon l’invention peut comporter d’autres caractéristiques qui peuvent être prises séparément ou en combinaison, et notamment :  The drive part according to the invention may include other characteristics which can be taken separately or in combination, and in particular:
- chaque protubérance peut présenter une forme rayonnée ; - each protuberance can have a radiated shape;
la forme rayonnée peut, par exemple, avoir un rayon compris entre 1 mm et 100 mm ;  the radiated shape can, for example, have a radius of between 1 mm and 100 mm;
- chaque sous-partie centrale peut faire partie intégrante d’une paroi qui comporte la face interne ;  - Each central sub-part can be an integral part of a wall which has the internal face;
- en variante, chaque sous-partie centrale peut être un élément qui est rapporté sur une paroi comportant la face interne ; - As a variant, each central sub-part may be an element which is attached to a wall comprising the internal face;
chaque sous-partie centrale peut être un élément rapporté par vissage sur la face interne de la paroi.  each central sub-part can be an element added by screwing on the internal face of the wall.
L’invention propose également un joint tripode comportant, d’une part, un élément interne muni de trois tourillons répartis à 120° les uns des autres dans un même plan, perpendiculaire à une direction axiale, et comportant chacun une extrémité équipée d’un galet, et, d’autre part, une pièce d’entraînement du type de celle présentée ci-avant et logeant cet élément interne.  The invention also provides a tripod joint comprising, on the one hand, an internal element provided with three journals distributed at 120 ° from each other in the same plane, perpendicular to an axial direction, and each comprising an end equipped with a roller, and, on the other hand, a drive part of the type presented above and housing this internal element.
L’invention propose également une boîte de vitesses destinée à faire partie d’une transmission transversale et comprenant un joint tripode du type de celui présenté ci-avant.  The invention also provides a gearbox intended to be part of a transverse transmission and comprising a tripod joint of the type presented above.
L’invention propose également un véhicule, éventuellement de type automobile, et comprenant au moins un joint tripode du type de celui présenté ci-avant ou une boîte de vitesses du type de celle présentée ci-avant.  The invention also provides a vehicle, possibly of the automobile type, and comprising at least one tripod joint of the type presented above or a gearbox of the type presented above.
Brève description des figures D’autres caractéristiques et avantages de l’invention apparaîtront à l’examen de la description détaillée ci-après, et des dessins annexés, sur lesquels : Brief description of the figures Other characteristics and advantages of the invention will appear on examining the detailed description below, and the appended drawings, in which:
- la figure 1 illustre schématiquement, dans une vue en coupe dans un plan longitudinal, un exemple de réalisation d’une pièce d’entraînement selon l’invention, équipée d’un seul galet, et  FIG. 1 schematically illustrates, in a sectional view in a longitudinal plane, an embodiment of a drive piece according to the invention, equipped with a single roller, and
- la figure 2 illustre schématiquement la pièce d’entraînement de la figure 1 dans une vue en coupe selon l’axe ll-ll.  - Figure 2 schematically illustrates the drive part of Figure 1 in a sectional view along the axis ll-ll.
Description détaillée de l’invention Detailed description of the invention
L’invention a notamment pour but de proposer une pièce d’entraînement PE destinée à faire partie d’un joint tripode JT.  The purpose of the invention is in particular to provide a PE drive part intended to be part of a JT tripod joint.
Dans ce qui suit, on considère, à titre d’exemple non limitatif, que le joint tripode JT est destiné à équiper une boîte de vitesses, et plus précisément à être solidarisé fixement à l’arbre de sortie d’une boîte de vitesses. Mais l’invention n’est pas limitée à cette application.  In what follows, it is considered, by way of nonlimiting example, that the tripod joint JT is intended to equip a gearbox, and more precisely to be fixedly secured to the output shaft of a gearbox. But the invention is not limited to this application.
Par ailleurs, on considère dans ce qui suit, à titre d’exemple non limitatif, que la boîte de vitesses est destinée à faire partie d’une transmission transversale d’un véhicule à roues (éventuellement de type automobile). Dans ce cas, le joint tripode couple l’arbre de sortie de la boîte de vitesses à l’arbre d’une roue du véhicule. Mais l’invention n’est limitée ni à ce type de boîte de vitesses, ni à ce type de véhicule.  Furthermore, it is considered in what follows, by way of nonlimiting example, that the gearbox is intended to be part of a transverse transmission of a wheeled vehicle (possibly of automobile type). In this case, the tripod seal couples the output shaft of the gearbox to the shaft of a vehicle wheel. However, the invention is not limited to this type of gearbox or to this type of vehicle.
On a schématiquement représenté sur les figures 1 et 2 un exemple de réalisation d’une pièce d’entraînement PE selon l’invention, avant qu’elle n’équipe un joint tripode JT, et donc avant son couplage à un élément interne de ce dernier (JT).  There is schematically shown in Figures 1 and 2 an embodiment of a PE drive part according to the invention, before it equips a tripod joint JT, and therefore before its coupling to an internal element of this last (JT).
Il est rappelé que l’élément interne comprend trois tourillons qui sont répartis à 120° les uns des autres dans un même plan, perpendiculaire à la direction axiale da d’un axe concourant qu’il équipe (appelé ci-après « axe tripode »), et qui comportent chacun une extrémité équipée d’un galet G. La position de l’un des trois galets G dans la pièce de d’entraînement PE est illustrée sur les figures 1 et 2. Comme illustré sur les figures 1 et 2, la pièce d’entraînement (ou bol entraîneur ou encore tulipe) PE comprend une paroi PP qui comporte une face interne Fl délimitant un logement ouvert LO. Ce logement ouvert LO comprend sur sa périphérie (située à proximité de la face interne Fl de la paroi PP) trois zones d’accueil ZA qui sont réparties à 120° les unes des autres et destinées chacune à loger en translation suivant la direction axiale da l’un des trois galets G. Ces trois zones d’accueil ZA définissent trois rampes rectilignes pour les translations respectives des trois galets G qui assurent la jonction et la transmission de la puissance mécanique entre leur axe tripode et la pièce d’entraînement PE. It is recalled that the internal element comprises three trunnions which are distributed at 120 ° from each other in the same plane, perpendicular to the axial direction da of a concurrent axis which it equips (hereinafter called "tripod axis" ), and which each have one end fitted with a roller G. The position of one of the three rollers G in the drive part PE is illustrated in FIGS. 1 and 2. As illustrated in FIGS. 1 and 2, the drive part (or entraining bowl or even tulip) PE comprises a wall PP which has an internal face F1 defining an open housing LO. This open housing LO comprises on its periphery (located near the internal face Fl of the wall PP) three reception zones ZA which are distributed at 120 ° from one another and each intended to be housed in translation in the axial direction da one of the three rollers G. These three reception zones ZA define three rectilinear ramps for the respective translations of the three rollers G which ensure the junction and the transmission of the mechanical power between their tripod axis and the drive part PE.
On notera que les trois galets G sont par exemple guidés en liaisons annulaires sur leurs trois tourillons respectifs par trois roulements à aiguilles. A cet effet, et comme illustré sur les figures 1 et 2, chaque galet G comprend un logement LT destiné à accueillir une partie terminale d’un tourillon avec son roulement à aiguilles.  It will be noted that the three rollers G are for example guided in annular connections on their three respective journals by three needle bearings. For this purpose, and as illustrated in FIGS. 1 and 2, each roller G comprises a housing LT intended to receive a terminal part of a journal with its needle bearing.
Comme cela apparait sur la figure 2, chaque partie de la face interne Fl délimitant une zone d’accueil ZA comprend une sous-partie centrale qui définit une protubérance PC s’étendant suivant la direction axiale da. Chaque protubérance PC est destinée à permettre au galet G associé de s’appuyer sur elle afin qu’il (G) reste dans la zone d’accueil ZA lors d’une rotation de la pièce d’entraînement PE.  As shown in FIG. 2, each part of the internal face F1 delimiting a reception zone ZA comprises a central sub-part which defines a protuberance PC extending in the axial direction da. Each protuberance PC is intended to allow the associated roller G to press on it so that it (G) remains in the reception zone ZA during a rotation of the drive element PE.
Ces trois appuis centraux des galets G sur les trois protubérances centrales PC associées permettent à ces galets G de rester constamment parallèles aux rampes rectilignes de leurs trois zones d’accueil ZA suivant la direction axiale da, et donc empêchent leur basculement lors d’une rotation de la pièce d’entraînement PE. En outre, les frottements des galets G lors de leurs translations dans les trois rampes rectilignes de leurs trois zones d’accueil ZA respectives sont réduits puisque chacun d’entre eux (G) n’a plus qu’un seul appui central sur la protubérance centrale PC associée. Cet unique appui central au lieu de deux appuis latéraux, comme dans l’art antérieur décrit dans le document brevet US 6,958,016, permet donc de réduire le ralentissement des translations de l’élément interne du joint tripode JT, et donc permet une diminution du temps de réaction du joint tripode JT. Chaque sous-partie centrale d’une zone d’accueil ZA, contenant une protubérance centrale PC, fait partie d’une face qui est sensiblement perpendiculaire à l’axe du tourillon associé. These three central bearings of the rollers G on the three central protuberances PC associated allow these rollers G to remain constantly parallel to the straight ramps of their three reception zones ZA in the axial direction da, and therefore prevent their tilting during a rotation of the PE drive part. In addition, the friction of the rollers G during their translations in the three straight ramps of their three respective reception zones ZA is reduced since each of them (G) has only one central support on the protuberance associated central PC. This single central support instead of two lateral supports, as in the prior art described in the document US Pat. No. 6,958,016, therefore makes it possible to reduce the slowing down of translations of the internal element of the JT tripod seal, and therefore allows a reduction in time. of reaction of the tripod joint JT. Each central sub-part of a reception zone ZA, containing a central protuberance PC, forms part of a face which is substantially perpendicular to the axis of the associated journal.
Afin de minimiser les frottements de chaque galet G sur la protubérance centrale PC associée, chaque protubérance centrale PC peut, par exemple, présenter une forme semi-sphérique.  In order to minimize the friction of each roller G on the associated central protuberance PC, each central protuberance PC may, for example, have a semi-spherical shape.
Par exemple, et comme illustré non limitativement sur la figure 2, chaque protubérance centrale PC peut présenter une forme rayonnée. Dans ce cas, la forme rayonnée peut, par exemple et non limitativement, avoir un rayon compris entre 1 mm et 100 mm. Ainsi, le rayon peut, par exemple, être égal à environ 30 mm.  For example, and as illustrated without limitation in FIG. 2, each central protuberance PC can have a radiated shape. In this case, the radiated shape can, for example and without limitation, have a radius between 1 mm and 100 mm. Thus, the radius can, for example, be equal to about 30 mm.
Mais cette forme semi-sphérique n’est pas obligatoire car ce qui est important c’est que chaque galet G ait un appui central pour l’empêcher de pivoter et le maintenir dans l’axe de la rampe rectiligne de sa zone d’accueil ZA. Par conséquent, chaque protubérance centrale PC pourrait se présenter sous la forme d’une « ligne » centrale (suivant la direction axiale da) de très faible épaisseur (suivant la direction de l’axe du tourillon associé).  But this semi-spherical shape is not compulsory because what is important is that each roller G has a central support to prevent it from pivoting and to keep it in the axis of the rectilinear ramp of its reception area ZA. Consequently, each central protuberance PC could be in the form of a central "line" (along the axial direction da) of very small thickness (along the direction of the axis of the associated journal).
On notera, comme illustré non limitativement sur la figure 2, que chaque sous-partie centrale (définissant une protubérance centrale PC) peut faire partie intégrante de la paroi PP qui comporte la face interne Fl.  It will be noted, as illustrated without limitation in FIG. 2, that each central sub-part (defining a central protuberance PC) can be an integral part of the wall PP which comprises the internal face Fl.
Mais dans une variante de réalisation non illustrée, chaque sous-partie centrale (définissant une protubérance centrale PC) peut être un élément rapporté sur la paroi PP qui comporte la face interne Fl. Dans ce cas, chaque sous-partie centrale peut, par exemple, être un élément qui est rapporté par vissage sur la face interne Fl de la paroi PP. Au lieu d’une solidarisation par vissage, on pourrait prévoir une solidarisation par soudage ou collage.  But in a variant embodiment not illustrated, each central sub-part (defining a central protuberance PC) can be an element attached to the wall PP which has the internal face F1. In this case, each central sub-part can, for example , be an element which is attached by screwing on the internal face F1 of the wall PP. Instead of a fastening by screwing, one could provide for a fastening by welding or gluing.

Claims

REVENDICATIONS
1. Pièce d’entraînement (PE) pour un joint tripode (JT) comportant un élément interne comprenant trois tourillons répartis à 120° les uns des autres dans un même plan, perpendiculaire à une direction axiale, et comportant chacun une extrémité équipée d’un galet (G), ladite pièce d’entraînement (PE) comprenant une face interne (Fl) délimitant un logement ouvert (LO) comportant en périphérie de trois zones d’accueil (ZA) réparties à 120° les unes des autres et destinées chacune à loger en translation suivant ladite direction axiale l’un desdits galets (G), caractérisée en ce que chaque partie de ladite face interne (Fl) délimitant une zone d’accueil (ZA) comprend une sous-partie centrale définissant une protubérance (PC) s’étendant suivant ladite direction axiale et sur laquelle est destiné à s’appuyer ledit galet (G) associé afin que ce dernier (G) reste dans ladite zone d’accueil (ZA) lors d’une rotation de ladite pièce d’entraînement (PE). 1. Drive part (PE) for a tripod joint (JT) comprising an internal element comprising three pins distributed at 120 ° from one another in the same plane, perpendicular to an axial direction, and each comprising an end equipped with a roller (G), said drive part (PE) comprising an internal face (Fl) delimiting an open housing (LO) comprising on the periphery of three reception zones (ZA) distributed at 120 ° from one another and intended each to be housed in translation in said axial direction one of said rollers (G), characterized in that each part of said internal face (Fl) delimiting a reception area (ZA) comprises a central sub-part defining a protuberance ( PC) extending in said axial direction and on which is intended to bear said associated roller (G) so that the latter (G) remains in said reception area (ZA) during a rotation of said piece d '' leads ment (PE).
2. Pièce d’entraînement selon la revendication 1 , caractérisée en ce que chaque protubérance (PC) présente une forme rayonnée.  2. Drive part according to claim 1, characterized in that each protuberance (PC) has a radiated shape.
3. Pièce d’entraînement selon la revendication 2, caractérisée en ce que ladite forme rayonnée a un rayon compris entre 1 mm et 100 mm.  3. Drive piece according to claim 2, characterized in that said radiated shape has a radius between 1 mm and 100 mm.
4. Pièce d’entraînement selon l’une des revendications 1 à 3, caractérisée en ce que chaque sous-partie centrale fait partie intégrante d’une paroi (PP) comportant ladite face interne (Fl).  4. Drive part according to one of claims 1 to 3, characterized in that each central sub-part is an integral part of a wall (PP) having said internal face (Fl).
5. Pièce d’entraînement selon l’une des revendications 1 à 3, caractérisée en ce que chaque sous-partie centrale est un élément rapporté sur une paroi (PP) comportant ladite face interne (Fl).  5. Drive part according to one of claims 1 to 3, characterized in that each central sub-part is an element attached to a wall (PP) having said internal face (Fl).
6. Pièce d’entraînement selon la revendication 5, caractérisée en ce que chaque sous-partie centrale est un élément rapporté par vissage sur ladite face interne (Fl) de la paroi (PP).  6. Drive part according to claim 5, characterized in that each central sub-part is an element attached by screwing on said internal face (Fl) of the wall (PP).
7. Joint tripode (JT) comportant un élément interne muni de trois tourillons répartis à 120° les uns des autres dansun même plan, perpendiculaire à une direction axiale, et comportant chacun une extrémité équipée d’un galet (G), caractérisé en ce qu’il comprend en outre une pièce d’entraînement (PE) selon l’une des revendications précédentes, logeant ledit élément interne. 7. Tripod joint (JT) comprising an internal element provided with three pins distributed at 120 ° from one another in the same plane, perpendicular to an axial direction, and each comprising an end equipped with a roller (G), characterized in that that it further comprises a drive part (PE) according to one of the preceding claims, housing said internal element.
8. Boîte de vitesses pour une transmission transversale, caractérisée en ce qu’elle comprend un joint tripode (JT) selon la revendication 7. 8. Gearbox for a transverse transmission, characterized in that it comprises a tripod joint (JT) according to claim 7.
9. Véhicule, caractérisé en ce qu’il comprend au moins un joint tripode (JT) selon la revendication 7 ou une boîte de vitesses selon la revendication 8.  9. Vehicle, characterized in that it comprises at least one tripod joint (JT) according to claim 7 or a gearbox according to claim 8.
10. Véhicule selon la revendication 9, caractérisé en ce qu’il est de type automobile.  10. Vehicle according to claim 9, characterized in that it is of the automobile type.
EP19787039.7A 2018-10-04 2019-09-12 Drive portion of a tripod joint with inner central anti-tilting protrusions Active EP3861223B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1859220A FR3086983A1 (en) 2018-10-04 2018-10-04 TRIPOD JOINT DRIVE WITH INTERNAL ANTI-TIPPING CENTRAL PROTUBERANCES
PCT/FR2019/052122 WO2020070400A1 (en) 2018-10-04 2019-09-12 Drive portion of a tripod joint with inner central anti-tilting protrusions

Publications (2)

Publication Number Publication Date
EP3861223A1 true EP3861223A1 (en) 2021-08-11
EP3861223B1 EP3861223B1 (en) 2022-12-14

Family

ID=65244130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19787039.7A Active EP3861223B1 (en) 2018-10-04 2019-09-12 Drive portion of a tripod joint with inner central anti-tilting protrusions

Country Status (4)

Country Link
EP (1) EP3861223B1 (en)
BR (1) BR112021005531A2 (en)
FR (1) FR3086983A1 (en)
WO (1) WO2020070400A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115143198B (en) * 2022-09-06 2022-11-18 万向钱潮股份公司 Lightweight wear-resistant universal joint

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384860A (en) * 1981-01-22 1983-05-24 Schmid Leopold F Three-roller universal joint
US6478682B1 (en) 1999-11-05 2002-11-12 Ntn Corporation Constant velocity universal joint
DE10246169A1 (en) 2002-10-02 2004-04-22 GKN Löbro GmbH Tripod joint for drive shaft between differential and drive gear of SUV, comprising roller carrying elements provided with stops
US8353777B2 (en) * 2009-02-20 2013-01-15 Steering Solutions Ip Holding Corporation Constant velocity joint having over-articulation protection
US20150198206A1 (en) * 2013-11-13 2015-07-16 Nexteer (Beijing) Technology Co., Ltd. Torque-transmitting joint and joint components, methods of manufacturing, and methods of inspection

Also Published As

Publication number Publication date
WO2020070400A1 (en) 2020-04-09
EP3861223B1 (en) 2022-12-14
BR112021005531A2 (en) 2021-06-29
FR3086983A1 (en) 2020-04-10

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